Zaffre (also spelt Zaffer), a prescientific, or alchemical substance, is a deep blue pigment obtained by roasting cobalt ore, and is made of either an impure form of cobalt oxide[1] or impure cobalt arsenate. During the Victorian Era, zaffre was used to prepare smalt and to stain glass blue.[2]
Zaffre | |
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Hex triplet | #0014A8 |
sRGBB (r, g, b) | (0, 20, 168) |
HSV (h, s, v) | (233°, 100%, 66%) |
CIELChuv (L, C, h) | (21, 81, 265°) |
Source | X11 |
ISCC–NBS descriptor | Deep blue |
B: Normalized to [0–255] (byte) |
The first recorded use of zaffer as a color name in English was sometime in the 1550s (exact year uncertain).[3]
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